The Pythagorean trig identities

Sample The Pythagorean trig identities questions

A few of the 4 questions, from easier to harder. Choose your exam board and tier to practise them, with every answer marked.

1. Question 12 marksGrade 6
   Simplify $4\sin^2\theta + 4\cos^2\theta$. [2]
   Show the worked solution

What are the common mistakes in The Pythagorean trig identities?

When a pupil makes one of these on Revision Workshop, the marking engine names the mistake and explains it, instead of just marking the answer wrong.

• Fails to factor out a common numeric factor before applying a trigonometric identity, leaving the expression only partly simplified

  Factor out the common $4$ first: $4\sin^2\theta+4\cos^2\theta=4(\sin^2\theta+\cos^2\theta)$

Quick answers about The Pythagorean trig identities

How many The Pythagorean trig identities practice questions are there?

There are 4 self-marking Additional Maths Maths questions on The Pythagorean trig identities, written for Cambridge IGCSE Additional Maths (0606) across Single tier. Each one is marked instantly and has a full worked solution.

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